US9400373B2ActiveUtilityA9

Optical imaging lens assembly

86
Assignee: LARGAN PRECISION COPriority: Jun 28, 2011Filed: Oct 1, 2013Granted: Jul 26, 2016
Est. expiryJun 28, 2031(~4.9 yrs left)· nominal 20-yr term from priority
Inventors:Hsin-Hsuan Huang
G02B 13/0045G02B 9/60G02B 13/18
86
PatentIndex Score
4
Cited by
3
References
20
Claims

Abstract

An optical imaging lens assembly, sequentially arranged from an object side to an image side along an optical axis, comprising: the first lens element with positive refractive power, the second lens element with negative refractive power having a convex object-side surface and a concave image-side surface, the third lens element with positive refractive power, the fourth lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the fifth lens element with refractive power having a concave image-side surface, and both object-side surface and image-side surface being aspheric, wherein a stop and an image sensor disposed on an image plane are also provided. By such arrangements, the image pickup optical system satisfies conditions related to shorten the total length and to reduce the sensitivity for use in compact cameras and mobile phones with camera functionalities.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. An optical imaging lens assembly, sequentially arranged from an object side to an image side, comprising:
 a first lens element with positive refractive power; 
 a second lens element with negative refractive power, having a convex object-side surface in proximity to an optical axis and a concave image-side surface in proximity to the optical axis; 
 a third lens element with positive refractive power; 
 a fourth lens element with negative refractive power, having a concave object-side surface in proximity to the optical axis and a convex image-side surface in proximity to the optical axis; and 
 a fifth lens element with refractive power, having a concave image-side surface in proximity to the optical axis, and both object-side surface and image-side surface being aspheric, at least one of the object-side surface and the image-side surface having at least one inflection point; 
 wherein, v 3  is an Abbe number of the third lens element, v 4  is an Abbe number of the fourth lens element, f is a focal length of the optical imaging lens assembly, f 3  is a focal length of the third lens element, and the following relations are satisfied:
   25< v   3   −v   4 <45; and 
   0.7< f/f   3 <2.5. 
 
 
     
     
       2. The optical imaging lens assembly of  claim 1 , wherein the third lens element has a convex image-side surface in proximity to the optical axis. 
     
     
       3. The optical imaging lens assembly of  claim 2 , wherein R 3  is a curvature radius of the object-side surface of the second lens element, R 4  is a curvature radius of the image-side surface of the second lens element, and the following relation is satisfied:
   0.1< R   4   /R   3 <0.8. 
 
     
     
       4. The optical imaging lens assembly of  claim 3 , wherein the third lens element has a concave object-side surface in proximity to the optical axis. 
     
     
       5. The optical imaging lens assembly of  claim 3 , wherein R 10  is a curvature radius of the image-side surface of the fifth lens element, CT 5  is a central thickness of the fifth lens element, and the following relation is satisfied:
   1.3< R   10   /CT   5 <3.0. 
 
     
     
       6. The optical imaging lens assembly of  claim 2 , wherein R 3  is a curvature radius of the object-side surface of the second lens element, R 4  is a curvature radius of the image-side surface of the second lens element, and the following relation is satisfied:
   0.25< R   4   /R   3 <0.55. 
 
     
     
       7. The optical imaging lens assembly of  claim 1 , wherein f is the focal length of the optical imaging lens assembly, f 3  is the focal length of the third lens element, and the following relations are satisfied:
   0.82< f/f   3 <1.7. 
 
     
     
       8. The optical imaging lens assembly of  claim 1 , wherein the first lens element has a convex object-side surface in proximity to the optical axis. 
     
     
       9. The optical imaging lens assembly of  claim 8 , further comprising an image sensor at an image plane, wherein TTL is an axial distance between the object-side surface of the first lens element and the image plane, and ImgH is a maximum image height of the optical imaging lens assembly, and the following relation is satisfied:
     TTL /ImgH<2.2. 
 
     
     
       10. The optical imaging lens assembly of  claim 8 , wherein v 1  is an Abbe number of the first lens element, v 2  is an Abbe number of the second lens element, and the following relation is satisfied:
   25< v   1   −v   2 <45. 
 
     
     
       11. The optical imaging lens assembly of  claim 8 , wherein R 1  is a curvature radius of the object-side surface of the first lens element, R 2  is a curvature radius of an image-side surface of the first lens element, and the following relation is satisfied:
   −1.5<( R   1   +R   2 )/( R   1   −R   2 )<−0.3.
 
 
     
     
       12. The optical imaging lens assembly of  claim 11 , wherein R 6  is a curvature radius of an image-side surface of the third lens element, CT 3  is a central thickness of the third lens element, and the following relation is satisfied:
   −4.5< R   6   /CT   3 <−0.5.
 
 
     
     
       13. The optical imaging lens assembly of  claim 11 , wherein the fifth lens element has a convex object-side surface in proximity to the optical axis. 
     
     
       14. An optical imaging lens assembly, sequentially arranged from an object side to an image side, comprising:
 a first lens element with positive refractive power; 
 a second lens element with negative refractive power, having a convex object-side surface in proximity to an optical axis and a concave image-side surface in proximity to the optical axis; 
 a third lens element with refractive power; 
 a fourth lens element with negative refractive power, having a concave object-side surface in proximity to the optical axis and a convex image-side surface in proximity to the optical axis; and 
 a fifth lens element with refractive power, having a concave image-side surface in proximity to the optical axis, and both object-side surface and image-side surface being aspheric, at least one of the object-side surface and the image-side surface having at least one inflection point; 
 wherein, v 3  is an Abbe number of the third lens element, v 4  is an Abbe number of the fourth lens element, R 10  is a curvature radius of the image-side surface of the fifth lens element, CT 5  is a central thickness of the fifth lens element, and the following relations are satisfied:
   25< v   3   −v   4 <45; and 
   1.3< R   10   /CT   5 ≦2.45.
 
 
 
     
     
       15. The optical imaging lens assembly of  claim 14 , wherein the third lens element has a convex image-side surface in proximity to the optical axis. 
     
     
       16. The optical imaging lens assembly of  claim 15 , wherein f is a focal length of the optical imaging lens assembly, f 3  is a focal length of the third lens element, and the following relation is satisfied:
   0.7< f/f   3 <2.5. 
 
     
     
       17. The optical imaging lens assembly of  claim 15 , wherein R 3  is a curvature radius of the object-side surface of the second lens element, R 4  is a curvature radius of the image-side surface of the second lens element, and the following relation is satisfied:
   0.1< R   4   /R   3 <0.8. 
 
     
     
       18. The optical imaging lens assembly of  claim 15 , wherein R 1  is a curvature radius of an object-side surface of the first lens element, R 2  is a curvature radius of an image-side surface of the first lens element, and the following relation is satisfied:
   −1.5<( R   1   +R   2 )/( R   1   −R   2 )<−0.3.
 
 
     
     
       19. The optical imaging lens assembly of  claim 18 , further comprising an image sensor at an image plane, wherein TTL is an axial distance between the object-side surface of the first lens element and the image plane, and ImgH is a maximum image height of the optical imaging lens assembly, and the following relation is satisfied:
     TTL /ImgH<2.2. 
 
     
     
       20. The optical imaging lens assembly of  claim 18 , wherein R 6  is a curvature radius of the image-side surface of the third lens element, CT 3  is a central thickness of the third lens element, and the following relation is satisfied:
   −4.5< R   6   /CT   3 <−0.5.

Join the waitlist — get patent alerts

Track US9400373B2 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.